Task chair



FIG. 1 is a front elevation view of a task chair incorporating my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a left side elevation view thereof, the right side elevation view being a mirror image; and,

FIG. 4 is a bottom plan view thereof.

The broken lines shown are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a task chair, as shown and described. 